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根据xml文件设计Student对象
我要评论<?xml version="1.0" encoding="UTF-8"?>
<students>
<course name = "平面设计">
<student id = "it001">
<name>章子怡</name>
<age>20</age>
<sex>女</sex>
<score>99</score>
</student>
<student id = "it002">
<name>杨颖</name>
<age>21</age>
<sex>女</sex>
<score>100</score>
</student>
</course>
<course name = "JavaEE">
<student id = "it003">
<name>汪峰</name>
<age>22</age>
<sex>男</sex>
<score>89</score>
</student>
<student id = "it004">
<name>撒贝宁</name>
<age>23</age>
<sex>男</sex>
<score>90</score>
</student>
</course>
</students>
设计学生类
package com.swift.kaoshi;
public class Student {
private String id;
private String name;
private int age;
private String sex;
private int score;
private String course;
public Student() {
super();
// TODO Auto-generated constructor stub
}
public Student(String id, String name, int age, String sex, int score, String course) {
super();
this.id = id;
this.name = name;
this.age = age;
this.sex = sex;
this.score = score;
this.course = course;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public int getAge() {
return age;
}
public void setAge(int age) {
this.age = age;
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public int getScore() {
return score;
}
public void setScore(int score) {
this.score = score;
}
public String getCourse() {
return course;
}
public void setCourse(String course) {
this.course = course;
}
@Override
public String toString() {
return "Student [id=" + id + ", name=" + name + ", age=" + age + ", sex=" + sex + ", score=" + score
+ ", course=" + course + "]";
}
}
根据菜单进行解析
package com.swift.kaoshi;
import java.io.File;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;
import org.apache.commons.beanutils.BeanUtils;
import org.dom4j.Attribute;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
/*
请按以下要求编写代码：
1. 按XML文档描述创建Student类(注意：包含id字段、科目字段)；
2. 为用户列出菜单：
【查询学员】
1.按学科 2.按性别 3.按年龄 4.按分数 5.退出
3. 用户选择：
1. 按学科：检索出XML中所有的”学科”名称，并继续列出菜单：
例如：1.平面设计 2.JavaEE
2. 按性别：列出性别选择二级菜单：
例如：1.男 2.女
3. 按年龄：请用户输入年龄范围，格式：小值-大值。
例如：20-25
4. 按分数：请用户输入分数范围，格式：小值-大值。
例如：80-100
4. 根据用户输入，在XML文件中检索出相应的学员信息，并使用Student对象封装，多个Student对象封装到一个ArrayList中；
5. 遍历ArrayList，为用户显示查询结果；*/
public class ReflectStudent {
public static void main(String[] args) throws Exception {
inputQuery();
}
private static void inputQuery() throws Exception {
System.out.println("[查询学员]");
List<String> courseList=new ArrayList<String>();
Scanner scan = new Scanner(System.in);
a:while (true) {
System.out.println();
System.out.println("1.按学科 2.按性别 3.按年龄 4.按分数 5.退出");
String key=scan.nextLine();
switch (key) {
case "1":
System.out.println("继续按学科查询学员~~");
SAXReader sax=new SAXReader();
Document document = sax.read(new File("students.xml"));
Element root =document.getRootElement();
List<Element> courses = root.elements("course");
for(Element course:courses) {
Attribute attribute=course.attribute("name");
String courseValue=attribute.getValue();
// System.out.println(courseValue);
courseList.add(courseValue);
}
System.out.println("1.按"+courseList.get(0)+" 2.按"+courseList.get(1));
String key_Course=scan.nextLine();
switch (key_Course) {
case "1":
System.out.println("继续按平面设计查询学员~~");
for(Element course:courses) {
Attribute attribute=course.attribute("name");
String courseValue=attribute.getValue();
if(courseValue.equals("平面设计")) {
// System.out.println("ok");
List<Element> listStudent=course.elements("student");
for(Element stu:listStudent) {
String id=stu.attribute("id").getValue();
String name=stu.element("name").getText();
String age=stu.element("age").getText();
String sex=stu.element("sex").getText();
String score=stu.element("score").getText();
//反射得到对象,BeanUtils设置属性进对象
Class clazz=Class.forName("com.swift.kaoshi.Student");
Object obj=clazz.getConstructor().newInstance();
Map<String,String[]> stus=new HashMap<String,String[]>();
stus.put("id", new String[] {id});
stus.put("name", new String[] {name});
stus.put("age", new String[] {age});
stus.put("sex", new String[] {sex});
stus.put("score", new String[] {score});
stus.put("course", new String[] {courseValue});
// System.out.println(stus);
Set<String> set = stus.keySet();
for(String s:set) {
// System.out.println(s);
// System.out.println(Arrays.toString(stus.get(s)));
}
BeanUtils.populate(obj, stus);
System.out.println(obj);
}
}
}
break;
case "2":
System.out.println("继续按JavaEE查询学员~~");
for(Element course:courses) {
Attribute attribute=course.attribute("name");
String courseValue=attribute.getValue();
if(courseValue.equals("JavaEE")) {
// System.out.println("ok");
List<Element> listStudent=course.elements("student");
for(Element stu:listStudent) {
String id=stu.attribute("id").getValue();
String name=stu.element("name").getText();
String age=stu.element("age").getText();
String sex=stu.element("sex").getText();
String score=stu.element("score").getText();
//反射得到对象,BeanUtils设置属性进对象
Class clazz=Class.forName("com.swift.kaoshi.Student");
Object obj=clazz.getConstructor().newInstance();
Map<String,String[]> stus=new HashMap<String,String[]>();
stus.put("id", new String[] {id});
stus.put("name", new String[] {name});
stus.put("age", new String[] {age});
stus.put("sex", new String[] {sex});
stus.put("score", new String[] {score});
stus.put("course", new String[] {courseValue});
// System.out.println(stus);
Set<String> set = stus.keySet();
for(String s:set) {
// System.out.println(s);
// System.out.println(Arrays.toString(stus.get(s)));
}
BeanUtils.populate(obj, stus);
System.out.println(obj);
}
}
}
break;
default:
System.out.println("抱歉,您输入的数字不符合要求,请重新输入.");
break;
}
break ;
case "2":
System.out.println("继续按性别查询学员~~");
break ;
case "3":
System.out.println("继续按年龄查询学员~~");
break ;
case "4":
System.out.println("继续按分数查询学员~~");
break ;
case "5":
System.out.println("选择结束,退出.");
break a;
default:
System.out.println("抱歉,您输入的数字不符合要求,请重新输入.");
break;
}
}
}
}
使用jar包
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